1 // SPDX-License-Identifier: GPL-2.0+
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7 * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
10 * Kai-Uwe Bloem, Auerswald GmbH & Co KG, <linux-development@auerswald.de>
13 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
15 * Added support for reading flash partition table from environment.
16 * Parsing routines are based on driver/mtd/cmdline.c from the linux 2.4
20 * Harald Welte, OpenMoko, Inc., Harald Welte <laforge@openmoko.org>
22 * $Id: cmdlinepart.c,v 1.17 2004/11/26 11:18:47 lavinen Exp $
23 * Copyright 2002 SYSGO Real-Time Solutions GmbH
27 * Three environment variables are used by the parsing routines:
29 * 'partition' - keeps current partition identifier
31 * partition := <part-id>
32 * <part-id> := <dev-id>,part_num
35 * 'mtdids' - linux kernel mtd device id <-> u-boot device id mapping
37 * mtdids=<idmap>[,<idmap>,...]
39 * <idmap> := <dev-id>=<mtd-id>
40 * <dev-id> := 'nand'|'nor'|'onenand'<dev-num>
41 * <dev-num> := mtd device number, 0...
42 * <mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)
45 * 'mtdparts' - partition list
47 * mtdparts=mtdparts=<mtd-def>[;<mtd-def>...]
49 * <mtd-def> := <mtd-id>:<part-def>[,<part-def>...]
50 * <mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)
51 * <part-def> := <size>[@<offset>][<name>][<ro-flag>]
52 * <size> := standard linux memsize OR '-' to denote all remaining space
53 * <offset> := partition start offset within the device
54 * <name> := '(' NAME ')'
55 * <ro-flag> := when set to 'ro' makes partition read-only (not used, passed to kernel)
58 * - each <mtd-id> used in mtdparts must albo exist in 'mtddis' mapping
59 * - if the above variables are not set defaults for a given target are used
63 * 1 NOR Flash, with 1 single writable partition:
64 * mtdids=nor0=edb7312-nor
65 * mtdparts=mtdparts=edb7312-nor:-
67 * 1 NOR Flash with 2 partitions, 1 NAND with one
68 * mtdids=nor0=edb7312-nor,nand0=edb7312-nand
69 * mtdparts=mtdparts=edb7312-nor:256k(ARMboot)ro,-(root);edb7312-nand:-(home)
76 #include <jffs2/load_kernel.h>
77 #include <linux/list.h>
78 #include <linux/ctype.h>
79 #include <linux/err.h>
80 #include <linux/mtd/mtd.h>
82 #if defined(CONFIG_CMD_NAND)
83 #include <linux/mtd/rawnand.h>
87 #if defined(CONFIG_CMD_ONENAND)
88 #include <linux/mtd/onenand.h>
89 #include <onenand_uboot.h>
92 DECLARE_GLOBAL_DATA_PTR;
94 /* special size referring to all the remaining space in a partition */
95 #define SIZE_REMAINING (~0llu)
97 /* special offset value, it is used when not provided by user
99 * this value is used temporarily during parsing, later such offests
100 * are recalculated */
101 #define OFFSET_NOT_SPECIFIED (~0llu)
103 /* minimum partition size */
104 #define MIN_PART_SIZE 4096
106 /* this flag needs to be set in part_info struct mask_flags
107 * field for read-only partitions */
108 #define MTD_WRITEABLE_CMD 1
110 /* default values for mtdids and mtdparts variables */
111 #if !defined(MTDIDS_DEFAULT)
112 #ifdef CONFIG_MTDIDS_DEFAULT
113 #define MTDIDS_DEFAULT CONFIG_MTDIDS_DEFAULT
115 #define MTDIDS_DEFAULT NULL
118 #if !defined(MTDPARTS_DEFAULT)
119 #ifdef CONFIG_MTDPARTS_DEFAULT
120 #define MTDPARTS_DEFAULT CONFIG_MTDPARTS_DEFAULT
122 #define MTDPARTS_DEFAULT NULL
125 #if defined(CONFIG_SYS_MTDPARTS_RUNTIME)
126 extern void board_mtdparts_default(const char **mtdids, const char **mtdparts);
128 static const char *mtdids_default = MTDIDS_DEFAULT;
129 static const char *mtdparts_default = MTDPARTS_DEFAULT;
131 /* copies of last seen 'mtdids', 'mtdparts' and 'partition' env variables */
132 #define MTDIDS_MAXLEN 128
133 #define MTDPARTS_MAXLEN 512
134 #define PARTITION_MAXLEN 16
135 static char last_ids[MTDIDS_MAXLEN + 1];
136 static char last_parts[MTDPARTS_MAXLEN + 1];
137 static char last_partition[PARTITION_MAXLEN + 1];
139 /* low level jffs2 cache cleaning routine */
140 extern void jffs2_free_cache(struct part_info *part);
142 /* mtdids mapping list, filled by parse_ids() */
143 static struct list_head mtdids;
145 /* device/partition list, parse_cmdline() parses into here */
146 static struct list_head devices;
148 /* current active device and partition number */
149 struct mtd_device *current_mtd_dev = NULL;
150 u8 current_mtd_partnum = 0;
154 static struct part_info* mtd_part_info(struct mtd_device *dev, unsigned int part_num);
156 /* command line only routines */
157 static struct mtdids* id_find_by_mtd_id(const char *mtd_id, unsigned int mtd_id_len);
158 static int device_del(struct mtd_device *dev);
161 * Parses a string into a number. The number stored at ptr is
162 * potentially suffixed with K (for kilobytes, or 1024 bytes),
163 * M (for megabytes, or 1048576 bytes), or G (for gigabytes, or
164 * 1073741824). If the number is suffixed with K, M, or G, then
165 * the return value is the number multiplied by one kilobyte, one
166 * megabyte, or one gigabyte, respectively.
168 * @param ptr where parse begins
169 * @param retptr output pointer to next char after parse completes (output)
170 * @return resulting unsigned int
172 static u64 memsize_parse (const char *const ptr, const char **retptr)
174 u64 ret = simple_strtoull(ptr, (char **)retptr, 0);
198 * Format string describing supplied size. This routine does the opposite job
199 * to memsize_parse(). Size in bytes is converted to string and if possible
200 * shortened by using k (kilobytes), m (megabytes) or g (gigabytes) suffix.
202 * Note, that this routine does not check for buffer overflow, it's the caller
203 * who must assure enough space.
205 * @param buf output buffer
206 * @param size size to be converted to string
208 static void memsize_format(char *buf, u64 size)
210 #define SIZE_GB ((u32)1024*1024*1024)
211 #define SIZE_MB ((u32)1024*1024)
212 #define SIZE_KB ((u32)1024)
214 if ((size % SIZE_GB) == 0)
215 sprintf(buf, "%llug", size/SIZE_GB);
216 else if ((size % SIZE_MB) == 0)
217 sprintf(buf, "%llum", size/SIZE_MB);
218 else if (size % SIZE_KB == 0)
219 sprintf(buf, "%lluk", size/SIZE_KB);
221 sprintf(buf, "%llu", size);
225 * This routine does global indexing of all partitions. Resulting index for
226 * current partition is saved in 'mtddevnum'. Current partition name in
229 static void index_partitions(void)
232 struct part_info *part;
233 struct list_head *dentry;
234 struct mtd_device *dev;
236 debug("--- index partitions ---\n");
238 if (current_mtd_dev) {
240 list_for_each(dentry, &devices) {
241 dev = list_entry(dentry, struct mtd_device, link);
242 if (dev == current_mtd_dev) {
243 mtddevnum += current_mtd_partnum;
244 env_set_ulong("mtddevnum", mtddevnum);
245 debug("=> mtddevnum %d,\n", mtddevnum);
248 mtddevnum += dev->num_parts;
251 part = mtd_part_info(current_mtd_dev, current_mtd_partnum);
253 env_set("mtddevname", part->name);
255 debug("=> mtddevname %s\n", part->name);
257 env_set("mtddevname", NULL);
259 debug("=> mtddevname NULL\n");
262 env_set("mtddevnum", NULL);
263 env_set("mtddevname", NULL);
265 debug("=> mtddevnum NULL\n=> mtddevname NULL\n");
270 * Save current device and partition in environment variable 'partition'.
272 static void current_save(void)
276 debug("--- current_save ---\n");
278 if (current_mtd_dev) {
279 sprintf(buf, "%s%d,%d", MTD_DEV_TYPE(current_mtd_dev->id->type),
280 current_mtd_dev->id->num, current_mtd_partnum);
282 env_set("partition", buf);
283 strncpy(last_partition, buf, 16);
285 debug("=> partition %s\n", buf);
287 env_set("partition", NULL);
288 last_partition[0] = '\0';
290 debug("=> partition NULL\n");
297 * Produce a mtd_info given a type and num.
299 * @param type mtd type
300 * @param num mtd number
301 * @param mtd a pointer to an mtd_info instance (output)
302 * @return 0 if device is valid, 1 otherwise
304 static int get_mtd_info(u8 type, u8 num, struct mtd_info **mtd)
308 sprintf(mtd_dev, "%s%d", MTD_DEV_TYPE(type), num);
309 *mtd = get_mtd_device_nm(mtd_dev);
311 printf("Device %s not found!\n", mtd_dev);
314 put_mtd_device(*mtd);
320 * Performs sanity check for supplied flash partition.
321 * Table of existing MTD flash devices is searched and partition device
322 * is located. Alignment with the granularity of nand erasesize is verified.
324 * @param id of the parent device
325 * @param part partition to validate
326 * @return 0 if partition is valid, 1 otherwise
328 static int part_validate_eraseblock(struct mtdids *id, struct part_info *part)
330 struct mtd_info *mtd = NULL;
335 if (get_mtd_info(id->type, id->num, &mtd))
338 part->sector_size = mtd->erasesize;
340 if (!mtd->numeraseregions) {
342 * Only one eraseregion (NAND, OneNAND or uniform NOR),
343 * checking for alignment is easy here
345 offset = part->offset;
346 if (do_div(offset, mtd->erasesize)) {
347 printf("%s%d: partition (%s) start offset"
348 "alignment incorrect\n",
349 MTD_DEV_TYPE(id->type), id->num, part->name);
354 if (do_div(size, mtd->erasesize)) {
355 printf("%s%d: partition (%s) size alignment incorrect\n",
356 MTD_DEV_TYPE(id->type), id->num, part->name);
361 * Multiple eraseregions (non-uniform NOR),
362 * checking for alignment is more complex here
365 /* Check start alignment */
366 for (i = 0; i < mtd->numeraseregions; i++) {
367 start = mtd->eraseregions[i].offset;
368 for (j = 0; j < mtd->eraseregions[i].numblocks; j++) {
369 if (part->offset == start)
371 start += mtd->eraseregions[i].erasesize;
375 printf("%s%d: partition (%s) start offset alignment incorrect\n",
376 MTD_DEV_TYPE(id->type), id->num, part->name);
381 /* Check end/size alignment */
382 for (i = 0; i < mtd->numeraseregions; i++) {
383 start = mtd->eraseregions[i].offset;
384 for (j = 0; j < mtd->eraseregions[i].numblocks; j++) {
385 if ((part->offset + part->size) == start)
387 start += mtd->eraseregions[i].erasesize;
390 /* Check last sector alignment */
391 if ((part->offset + part->size) == start)
394 printf("%s%d: partition (%s) size alignment incorrect\n",
395 MTD_DEV_TYPE(id->type), id->num, part->name);
407 * Performs sanity check for supplied partition. Offset and size are
408 * verified to be within valid range. Partition type is checked and
409 * part_validate_eraseblock() is called with the argument of part.
411 * @param id of the parent device
412 * @param part partition to validate
413 * @return 0 if partition is valid, 1 otherwise
415 static int part_validate(struct mtdids *id, struct part_info *part)
417 if (part->size == SIZE_REMAINING)
418 part->size = id->size - part->offset;
420 if (part->offset > id->size) {
421 printf("%s: offset %08llx beyond flash size %08llx\n",
422 id->mtd_id, part->offset, id->size);
426 if ((part->offset + part->size) <= part->offset) {
427 printf("%s%d: partition (%s) size too big\n",
428 MTD_DEV_TYPE(id->type), id->num, part->name);
432 if (part->offset + part->size > id->size) {
433 printf("%s: partitioning exceeds flash size\n", id->mtd_id);
438 * Now we need to check if the partition starts and ends on
439 * sector (eraseblock) regions
441 return part_validate_eraseblock(id, part);
445 * Delete selected partition from the partition list of the specified device.
447 * @param dev device to delete partition from
448 * @param part partition to delete
449 * @return 0 on success, 1 otherwise
451 static int part_del(struct mtd_device *dev, struct part_info *part)
453 u8 current_save_needed = 0;
455 /* if there is only one partition, remove whole device */
456 if (dev->num_parts == 1)
457 return device_del(dev);
459 /* otherwise just delete this partition */
461 if (dev == current_mtd_dev) {
462 /* we are modyfing partitions for the current device,
464 struct part_info *curr_pi;
465 curr_pi = mtd_part_info(current_mtd_dev, current_mtd_partnum);
468 if (curr_pi == part) {
469 printf("current partition deleted, resetting current to 0\n");
470 current_mtd_partnum = 0;
471 } else if (part->offset <= curr_pi->offset) {
472 current_mtd_partnum--;
474 current_save_needed = 1;
478 list_del(&part->link);
482 if (current_save_needed > 0)
491 * Delete all partitions from parts head list, free memory.
493 * @param head list of partitions to delete
495 static void part_delall(struct list_head *head)
497 struct list_head *entry, *n;
498 struct part_info *part_tmp;
500 /* clean tmp_list and free allocated memory */
501 list_for_each_safe(entry, n, head) {
502 part_tmp = list_entry(entry, struct part_info, link);
510 * Add new partition to the supplied partition list. Make sure partitions are
511 * sorted by offset in ascending order.
513 * @param head list this partition is to be added to
514 * @param new partition to be added
516 static int part_sort_add(struct mtd_device *dev, struct part_info *part)
518 struct list_head *entry;
519 struct part_info *new_pi, *curr_pi;
521 /* link partition to parrent dev */
524 if (list_empty(&dev->parts)) {
525 debug("part_sort_add: list empty\n");
526 list_add(&part->link, &dev->parts);
532 new_pi = list_entry(&part->link, struct part_info, link);
534 /* get current partition info if we are updating current device */
536 if (dev == current_mtd_dev)
537 curr_pi = mtd_part_info(current_mtd_dev, current_mtd_partnum);
539 list_for_each(entry, &dev->parts) {
540 struct part_info *pi;
542 pi = list_entry(entry, struct part_info, link);
544 /* be compliant with kernel cmdline, allow only one partition at offset zero */
545 if ((new_pi->offset == pi->offset) && (pi->offset == 0)) {
546 printf("cannot add second partition at offset 0\n");
550 if (new_pi->offset <= pi->offset) {
551 list_add_tail(&part->link, entry);
554 if (curr_pi && (pi->offset <= curr_pi->offset)) {
555 /* we are modyfing partitions for the current
556 * device, update current */
557 current_mtd_partnum++;
566 list_add_tail(&part->link, &dev->parts);
573 * Add provided partition to the partition list of a given device.
575 * @param dev device to which partition is added
576 * @param part partition to be added
577 * @return 0 on success, 1 otherwise
579 static int part_add(struct mtd_device *dev, struct part_info *part)
581 /* verify alignment and size */
582 if (part_validate(dev->id, part) != 0)
585 /* partition is ok, add it to the list */
586 if (part_sort_add(dev, part) != 0)
593 * Parse one partition definition, allocate memory and return pointer to this
594 * location in retpart.
596 * @param partdef pointer to the partition definition string i.e. <part-def>
597 * @param ret output pointer to next char after parse completes (output)
598 * @param retpart pointer to the allocated partition (output)
599 * @return 0 on success, 1 otherwise
601 static int part_parse(const char *const partdef, const char **ret, struct part_info **retpart)
603 struct part_info *part;
608 unsigned int mask_flags;
615 /* fetch the partition size */
617 /* assign all remaining space to this partition */
618 debug("'-': remaining size assigned\n");
619 size = SIZE_REMAINING;
622 size = memsize_parse(p, &p);
623 if (size < MIN_PART_SIZE) {
624 printf("partition size too small (%llx)\n", size);
629 /* check for offset */
630 offset = OFFSET_NOT_SPECIFIED;
633 offset = memsize_parse(p, &p);
636 /* now look for the name */
639 if ((p = strchr(name, ')')) == NULL) {
640 printf("no closing ) found in partition name\n");
643 name_len = p - name + 1;
644 if ((name_len - 1) == 0) {
645 printf("empty partition name\n");
650 /* 0x00000000@0x00000000 */
655 /* test for options */
657 if (strncmp(p, "ro", 2) == 0) {
658 mask_flags |= MTD_WRITEABLE_CMD;
662 /* check for next partition definition */
664 if (size == SIZE_REMAINING) {
666 printf("no partitions allowed after a fill-up partition\n");
670 } else if ((*p == ';') || (*p == '\0')) {
673 printf("unexpected character '%c' at the end of partition\n", *p);
678 /* allocate memory */
679 part = (struct part_info *)malloc(sizeof(struct part_info) + name_len);
681 printf("out of memory\n");
684 memset(part, 0, sizeof(struct part_info) + name_len);
686 part->offset = offset;
687 part->mask_flags = mask_flags;
688 part->name = (char *)(part + 1);
691 /* copy user provided name */
692 strncpy(part->name, name, name_len - 1);
695 /* auto generated name in form of size@offset */
696 snprintf(part->name, name_len, "0x%08llx@0x%08llx", size, offset);
700 part->name[name_len - 1] = '\0';
701 INIT_LIST_HEAD(&part->link);
703 debug("+ partition: name %-22s size 0x%08llx offset 0x%08llx mask flags %d\n",
704 part->name, part->size,
705 part->offset, part->mask_flags);
712 * Check device number to be within valid range for given device type.
714 * @param type mtd type
715 * @param num mtd number
716 * @param size a pointer to the size of the mtd device (output)
717 * @return 0 if device is valid, 1 otherwise
719 static int mtd_device_validate(u8 type, u8 num, u64 *size)
721 struct mtd_info *mtd = NULL;
723 if (get_mtd_info(type, num, &mtd))
732 * Delete all mtd devices from a supplied devices list, free memory allocated for
733 * each device and delete all device partitions.
735 * @return 0 on success, 1 otherwise
737 static int device_delall(struct list_head *head)
739 struct list_head *entry, *n;
740 struct mtd_device *dev_tmp;
742 /* clean devices list */
743 list_for_each_safe(entry, n, head) {
744 dev_tmp = list_entry(entry, struct mtd_device, link);
746 part_delall(&dev_tmp->parts);
749 INIT_LIST_HEAD(&devices);
755 * If provided device exists it's partitions are deleted, device is removed
756 * from device list and device memory is freed.
758 * @param dev device to be deleted
759 * @return 0 on success, 1 otherwise
761 static int device_del(struct mtd_device *dev)
763 part_delall(&dev->parts);
764 list_del(&dev->link);
767 if (dev == current_mtd_dev) {
768 /* we just deleted current device */
769 if (list_empty(&devices)) {
770 current_mtd_dev = NULL;
772 /* reset first partition from first dev from the
773 * devices list as current */
774 current_mtd_dev = list_entry(devices.next, struct mtd_device, link);
775 current_mtd_partnum = 0;
786 * Search global device list and return pointer to the device of type and num
789 * @param type device type
790 * @param num device number
791 * @return NULL if requested device does not exist
793 struct mtd_device *device_find(u8 type, u8 num)
795 struct list_head *entry;
796 struct mtd_device *dev_tmp;
798 list_for_each(entry, &devices) {
799 dev_tmp = list_entry(entry, struct mtd_device, link);
801 if ((dev_tmp->id->type == type) && (dev_tmp->id->num == num))
809 * Add specified device to the global device list.
811 * @param dev device to be added
813 static void device_add(struct mtd_device *dev)
815 u8 current_save_needed = 0;
817 if (list_empty(&devices)) {
818 current_mtd_dev = dev;
819 current_mtd_partnum = 0;
820 current_save_needed = 1;
823 list_add_tail(&dev->link, &devices);
825 if (current_save_needed > 0)
832 * Parse device type, name and mtd-id. If syntax is ok allocate memory and
833 * return pointer to the device structure.
835 * @param mtd_dev pointer to the device definition string i.e. <mtd-dev>
836 * @param ret output pointer to next char after parse completes (output)
837 * @param retdev pointer to the allocated device (output)
838 * @return 0 on success, 1 otherwise
840 static int device_parse(const char *const mtd_dev, const char **ret, struct mtd_device **retdev)
842 struct mtd_device *dev;
843 struct part_info *part;
846 unsigned int mtd_id_len;
850 struct list_head *entry, *n;
855 debug("===device_parse===\n");
864 mtd_id = p = mtd_dev;
865 if (!(p = strchr(mtd_id, ':'))) {
866 printf("no <mtd-id> identifier\n");
869 mtd_id_len = p - mtd_id + 1;
872 /* verify if we have a valid device specified */
873 if ((id = id_find_by_mtd_id(mtd_id, mtd_id_len - 1)) == NULL) {
874 printf("invalid mtd device '%.*s'\n", mtd_id_len - 1, mtd_id);
878 pend = strchr(p, ';');
879 debug("dev type = %d (%s), dev num = %d, mtd-id = %s\n",
880 id->type, MTD_DEV_TYPE(id->type),
881 id->num, id->mtd_id);
882 debug("parsing partitions %.*s\n", (int)(pend ? pend - p : strlen(p)), p);
884 /* parse partitions */
888 if ((dev = device_find(id->type, id->num)) != NULL) {
889 /* if device already exists start at the end of the last partition */
890 part = list_entry(dev->parts.prev, struct part_info, link);
891 offset = part->offset + part->size;
894 while (p && (*p != '\0') && (*p != ';')) {
896 if ((part_parse(p, &p, &part) != 0) || (!part))
899 /* calculate offset when not specified */
900 if (part->offset == OFFSET_NOT_SPECIFIED)
901 part->offset = offset;
903 offset = part->offset;
905 /* verify alignment and size */
906 if (part_validate(id, part) != 0)
909 offset += part->size;
911 /* partition is ok, add it to the list */
912 list_add_tail(&part->link, &tmp_list);
917 part_delall(&tmp_list);
921 debug("\ntotal partitions: %d\n", num_parts);
923 /* check for next device presence */
928 } else if (*p == '\0') {
932 printf("unexpected character '%c' at the end of device\n", *p);
939 /* allocate memory for mtd_device structure */
940 if ((dev = (struct mtd_device *)malloc(sizeof(struct mtd_device))) == NULL) {
941 printf("out of memory\n");
944 memset(dev, 0, sizeof(struct mtd_device));
946 dev->num_parts = 0; /* part_sort_add increments num_parts */
947 INIT_LIST_HEAD(&dev->parts);
948 INIT_LIST_HEAD(&dev->link);
950 /* move partitions from tmp_list to dev->parts */
951 list_for_each_safe(entry, n, &tmp_list) {
952 part = list_entry(entry, struct part_info, link);
954 if (part_sort_add(dev, part) != 0) {
967 * Initialize global device list.
969 * @return 0 on success, 1 otherwise
971 static int mtd_devices_init(void)
973 last_parts[0] = '\0';
974 current_mtd_dev = NULL;
977 return device_delall(&devices);
981 * Search global mtdids list and find id of requested type and number.
983 * @return pointer to the id if it exists, NULL otherwise
985 static struct mtdids* id_find(u8 type, u8 num)
987 struct list_head *entry;
990 list_for_each(entry, &mtdids) {
991 id = list_entry(entry, struct mtdids, link);
993 if ((id->type == type) && (id->num == num))
1001 * Search global mtdids list and find id of a requested mtd_id.
1003 * Note: first argument is not null terminated.
1005 * @param mtd_id string containing requested mtd_id
1006 * @param mtd_id_len length of supplied mtd_id
1007 * @return pointer to the id if it exists, NULL otherwise
1009 static struct mtdids* id_find_by_mtd_id(const char *mtd_id, unsigned int mtd_id_len)
1011 struct list_head *entry;
1014 debug("--- id_find_by_mtd_id: '%.*s' (len = %d)\n",
1015 mtd_id_len, mtd_id, mtd_id_len);
1017 list_for_each(entry, &mtdids) {
1018 id = list_entry(entry, struct mtdids, link);
1020 debug("entry: '%s' (len = %zu)\n",
1021 id->mtd_id, strlen(id->mtd_id));
1023 if (mtd_id_len != strlen(id->mtd_id))
1025 if (strncmp(id->mtd_id, mtd_id, mtd_id_len) == 0)
1033 * Parse device id string <dev-id> := 'nand'|'nor'|'onenand'<dev-num>,
1034 * return device type and number.
1036 * @param id string describing device id
1037 * @param ret_id output pointer to next char after parse completes (output)
1038 * @param dev_type parsed device type (output)
1039 * @param dev_num parsed device number (output)
1040 * @return 0 on success, 1 otherwise
1042 int mtd_id_parse(const char *id, const char **ret_id, u8 *dev_type,
1048 if (strncmp(p, "nand", 4) == 0) {
1049 *dev_type = MTD_DEV_TYPE_NAND;
1051 } else if (strncmp(p, "nor", 3) == 0) {
1052 *dev_type = MTD_DEV_TYPE_NOR;
1054 } else if (strncmp(p, "onenand", 7) == 0) {
1055 *dev_type = MTD_DEV_TYPE_ONENAND;
1058 printf("incorrect device type in %s\n", id);
1063 printf("incorrect device number in %s\n", id);
1067 *dev_num = simple_strtoul(p, (char **)&p, 0);
1074 * Process all devices and generate corresponding mtdparts string describing
1075 * all partitions on all devices.
1077 * @param buf output buffer holding generated mtdparts string (output)
1078 * @param buflen buffer size
1079 * @return 0 on success, 1 otherwise
1081 static int generate_mtdparts(char *buf, u32 buflen)
1083 struct list_head *pentry, *dentry;
1084 struct mtd_device *dev;
1085 struct part_info *part, *prev_part;
1090 u32 maxlen = buflen - 1;
1092 debug("--- generate_mtdparts ---\n");
1094 if (list_empty(&devices)) {
1099 strcpy(p, "mtdparts=");
1102 list_for_each(dentry, &devices) {
1103 dev = list_entry(dentry, struct mtd_device, link);
1106 len = strlen(dev->id->mtd_id) + 1;
1109 memcpy(p, dev->id->mtd_id, len - 1);
1114 /* format partitions */
1117 list_for_each(pentry, &dev->parts) {
1118 part = list_entry(pentry, struct part_info, link);
1120 offset = part->offset;
1123 /* partition size */
1124 memsize_format(tmpbuf, size);
1125 len = strlen(tmpbuf);
1128 memcpy(p, tmpbuf, len);
1133 /* add offset only when there is a gap between
1135 if ((!prev_part && (offset != 0)) ||
1136 (prev_part && ((prev_part->offset + prev_part->size) != part->offset))) {
1138 memsize_format(tmpbuf, offset);
1139 len = strlen(tmpbuf) + 1;
1143 memcpy(p, tmpbuf, len - 1);
1148 /* copy name only if user supplied */
1149 if(!part->auto_name) {
1150 len = strlen(part->name) + 2;
1155 memcpy(p, part->name, len - 2);
1162 if (part->mask_flags && MTD_WRITEABLE_CMD) {
1171 /* print ',' separator if there are other partitions
1173 if (dev->num_parts > part_cnt) {
1181 /* print ';' separator if there are other devices following */
1182 if (dentry->next != &devices) {
1190 /* we still have at least one char left, as we decremented maxlen at
1197 last_parts[0] = '\0';
1202 * Call generate_mtdparts to process all devices and generate corresponding
1203 * mtdparts string, save it in mtdparts environment variable.
1205 * @param buf output buffer holding generated mtdparts string (output)
1206 * @param buflen buffer size
1207 * @return 0 on success, 1 otherwise
1209 static int generate_mtdparts_save(char *buf, u32 buflen)
1213 ret = generate_mtdparts(buf, buflen);
1215 if ((buf[0] != '\0') && (ret == 0))
1216 env_set("mtdparts", buf);
1218 env_set("mtdparts", NULL);
1223 #if defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES)
1225 * Get the net size (w/o bad blocks) of the given partition.
1227 * @param mtd the mtd info
1228 * @param part the partition
1229 * @return the calculated net size of this partition
1231 static uint64_t net_part_size(struct mtd_info *mtd, struct part_info *part)
1233 uint64_t i, net_size = 0;
1235 if (!mtd->block_isbad)
1238 for (i = 0; i < part->size; i += mtd->erasesize) {
1239 if (!mtd->block_isbad(mtd, part->offset + i))
1240 net_size += mtd->erasesize;
1247 static void print_partition_table(void)
1249 struct list_head *dentry, *pentry;
1250 struct part_info *part;
1251 struct mtd_device *dev;
1254 list_for_each(dentry, &devices) {
1255 dev = list_entry(dentry, struct mtd_device, link);
1256 /* list partitions for given device */
1258 #if defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES)
1259 struct mtd_info *mtd;
1261 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
1264 printf("\ndevice %s%d <%s>, # parts = %d\n",
1265 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1266 dev->id->mtd_id, dev->num_parts);
1267 printf(" #: name\t\tsize\t\tnet size\toffset\t\tmask_flags\n");
1269 list_for_each(pentry, &dev->parts) {
1273 part = list_entry(pentry, struct part_info, link);
1274 net_size = net_part_size(mtd, part);
1275 size_note = part->size == net_size ? " " : " (!)";
1276 printf("%2d: %-20s0x%08x\t0x%08x%s\t0x%08x\t%d\n",
1277 part_num, part->name, part->size,
1278 net_size, size_note, part->offset,
1280 #else /* !defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) */
1281 printf("\ndevice %s%d <%s>, # parts = %d\n",
1282 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1283 dev->id->mtd_id, dev->num_parts);
1284 printf(" #: name\t\tsize\t\toffset\t\tmask_flags\n");
1286 list_for_each(pentry, &dev->parts) {
1287 part = list_entry(pentry, struct part_info, link);
1288 printf("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
1289 part_num, part->name, part->size,
1290 part->offset, part->mask_flags);
1291 #endif /* defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) */
1296 if (list_empty(&devices))
1297 printf("no partitions defined\n");
1301 * Format and print out a partition list for each device from global device
1304 static void list_partitions(void)
1306 struct part_info *part;
1308 debug("\n---list_partitions---\n");
1309 print_partition_table();
1311 /* current_mtd_dev is not NULL only when we have non empty device list */
1312 if (current_mtd_dev) {
1313 part = mtd_part_info(current_mtd_dev, current_mtd_partnum);
1315 printf("\nactive partition: %s%d,%d - (%s) 0x%08llx @ 0x%08llx\n",
1316 MTD_DEV_TYPE(current_mtd_dev->id->type),
1317 current_mtd_dev->id->num, current_mtd_partnum,
1318 part->name, part->size, part->offset);
1320 printf("could not get current partition info\n\n");
1324 printf("\ndefaults:\n");
1325 printf("mtdids : %s\n",
1326 mtdids_default ? mtdids_default : "none");
1328 * Using printf() here results in printbuffer overflow
1329 * if default mtdparts string is greater than console
1330 * printbuffer. Use puts() to prevent system crashes.
1333 puts(mtdparts_default ? mtdparts_default : "none");
1338 * Given partition identifier in form of <dev_type><dev_num>,<part_num> find
1339 * corresponding device and verify partition number.
1341 * @param id string describing device and partition or partition name
1342 * @param dev pointer to the requested device (output)
1343 * @param part_num verified partition number (output)
1344 * @param part pointer to requested partition (output)
1345 * @return 0 on success, 1 otherwise
1347 int find_dev_and_part(const char *id, struct mtd_device **dev,
1348 u8 *part_num, struct part_info **part)
1350 struct list_head *dentry, *pentry;
1351 u8 type, dnum, pnum;
1354 debug("--- find_dev_and_part ---\nid = %s\n", id);
1356 list_for_each(dentry, &devices) {
1358 *dev = list_entry(dentry, struct mtd_device, link);
1359 list_for_each(pentry, &(*dev)->parts) {
1360 *part = list_entry(pentry, struct part_info, link);
1361 if (strcmp((*part)->name, id) == 0)
1372 if (mtd_id_parse(p, &p, &type, &dnum) != 0)
1375 if ((*p++ != ',') || (*p == '\0')) {
1376 printf("no partition number specified\n");
1379 pnum = simple_strtoul(p, (char **)&p, 0);
1381 printf("unexpected trailing character '%c'\n", *p);
1385 if ((*dev = device_find(type, dnum)) == NULL) {
1386 printf("no such device %s%d\n", MTD_DEV_TYPE(type), dnum);
1390 if ((*part = mtd_part_info(*dev, pnum)) == NULL) {
1391 printf("no such partition\n");
1402 * Find and delete partition. For partition id format see find_dev_and_part().
1404 * @param id string describing device and partition
1405 * @return 0 on success, 1 otherwise
1407 static int delete_partition(const char *id)
1410 struct mtd_device *dev;
1411 struct part_info *part;
1413 if (find_dev_and_part(id, &dev, &pnum, &part) == 0) {
1415 debug("delete_partition: device = %s%d, partition %d = (%s) 0x%08llx@0x%08llx\n",
1416 MTD_DEV_TYPE(dev->id->type), dev->id->num, pnum,
1417 part->name, part->size, part->offset);
1419 if (part_del(dev, part) != 0)
1422 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
1423 printf("generated mtdparts too long, resetting to null\n");
1429 printf("partition %s not found\n", id);
1433 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
1435 * Increase the size of the given partition so that it's net size is at least
1436 * as large as the size member and such that the next partition would start on a
1437 * good block if it were adjacent to this partition.
1439 * @param mtd the mtd device
1440 * @param part the partition
1441 * @param next_offset pointer to the offset of the next partition after this
1442 * partition's size has been modified (output)
1444 static void spread_partition(struct mtd_info *mtd, struct part_info *part,
1445 uint64_t *next_offset)
1447 uint64_t net_size, padding_size = 0;
1450 mtd_get_len_incl_bad(mtd, part->offset, part->size, &net_size,
1454 * Absorb bad blocks immediately following this
1455 * partition also into the partition, such that
1456 * the next partition starts with a good block.
1459 mtd_get_len_incl_bad(mtd, part->offset + net_size,
1460 mtd->erasesize, &padding_size, &truncated);
1464 padding_size -= mtd->erasesize;
1468 printf("truncated partition %s to %lld bytes\n", part->name,
1469 (uint64_t) net_size + padding_size);
1472 part->size = net_size + padding_size;
1473 *next_offset = part->offset + part->size;
1477 * Adjust all of the partition sizes, such that all partitions are at least
1478 * as big as their mtdparts environment variable sizes and they each start
1481 * @return 0 on success, 1 otherwise
1483 static int spread_partitions(void)
1485 struct list_head *dentry, *pentry;
1486 struct mtd_device *dev;
1487 struct part_info *part;
1488 struct mtd_info *mtd;
1492 list_for_each(dentry, &devices) {
1493 dev = list_entry(dentry, struct mtd_device, link);
1495 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
1500 list_for_each(pentry, &dev->parts) {
1501 part = list_entry(pentry, struct part_info, link);
1503 debug("spread_partitions: device = %s%d, partition %d ="
1504 " (%s) 0x%08llx@0x%08llx\n",
1505 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1506 part_num, part->name, part->size,
1509 if (cur_offs > part->offset)
1510 part->offset = cur_offs;
1512 spread_partition(mtd, part, &cur_offs);
1520 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
1521 printf("generated mtdparts too long, resetting to null\n");
1526 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
1529 * The mtdparts variable tends to be long. If we need to access it
1530 * before the env is relocated, then we need to use our own stack
1531 * buffer. gd->env_buf will be too small.
1533 * @param buf temporary buffer pointer MTDPARTS_MAXLEN long
1534 * @return mtdparts variable string, NULL if not found
1536 static const char *env_get_mtdparts(char *buf)
1538 if (gd->flags & GD_FLG_ENV_READY)
1539 return env_get("mtdparts");
1540 if (env_get_f("mtdparts", buf, MTDPARTS_MAXLEN) != -1)
1546 * Accept character string describing mtd partitions and call device_parse()
1547 * for each entry. Add created devices to the global devices list.
1549 * @param mtdparts string specifing mtd partitions
1550 * @return 0 on success, 1 otherwise
1552 static int parse_mtdparts(const char *const mtdparts)
1555 struct mtd_device *dev;
1557 char tmp_parts[MTDPARTS_MAXLEN];
1559 debug("\n---parse_mtdparts---\nmtdparts = %s\n\n", mtdparts);
1561 /* delete all devices and partitions */
1562 if (mtd_devices_init() != 0) {
1563 printf("could not initialise device list\n");
1567 /* re-read 'mtdparts' variable, mtd_devices_init may be updating env */
1568 p = env_get_mtdparts(tmp_parts);
1572 if (strncmp(p, "mtdparts=", 9) != 0) {
1573 printf("mtdparts variable doesn't start with 'mtdparts='\n");
1578 while (*p != '\0') {
1580 if ((device_parse(p, &p, &dev) != 0) || (!dev))
1583 debug("+ device: %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type),
1584 dev->id->num, dev->id->mtd_id);
1586 /* check if parsed device is already on the list */
1587 if (device_find(dev->id->type, dev->id->num) != NULL) {
1588 printf("device %s%d redefined, please correct mtdparts variable\n",
1589 MTD_DEV_TYPE(dev->id->type), dev->id->num);
1593 list_add_tail(&dev->link, &devices);
1598 device_delall(&devices);
1605 * Parse provided string describing mtdids mapping (see file header for mtdids
1606 * variable format). Allocate memory for each entry and add all found entries
1607 * to the global mtdids list.
1609 * @param ids mapping string
1610 * @return 0 on success, 1 otherwise
1612 static int parse_mtdids(const char *const ids)
1614 const char *p = ids;
1618 struct list_head *entry, *n;
1619 struct mtdids *id_tmp;
1624 debug("\n---parse_mtdids---\nmtdids = %s\n\n", ids);
1626 /* clean global mtdids list */
1627 list_for_each_safe(entry, n, &mtdids) {
1628 id_tmp = list_entry(entry, struct mtdids, link);
1629 debug("mtdids del: %d %d\n", id_tmp->type, id_tmp->num);
1634 INIT_LIST_HEAD(&mtdids);
1636 while(p && (*p != '\0')) {
1639 /* parse 'nor'|'nand'|'onenand'<dev-num> */
1640 if (mtd_id_parse(p, &p, &type, &num) != 0)
1644 printf("mtdids: incorrect <dev-num>\n");
1649 /* check if requested device exists */
1650 if (mtd_device_validate(type, num, &size) != 0)
1653 /* locate <mtd-id> */
1655 if ((p = strchr(mtd_id, ',')) != NULL) {
1656 mtd_id_len = p - mtd_id + 1;
1659 mtd_id_len = strlen(mtd_id) + 1;
1661 if (mtd_id_len == 0) {
1662 printf("mtdids: no <mtd-id> identifier\n");
1666 /* check if this id is already on the list */
1667 int double_entry = 0;
1668 list_for_each(entry, &mtdids) {
1669 id_tmp = list_entry(entry, struct mtdids, link);
1670 if ((id_tmp->type == type) && (id_tmp->num == num)) {
1676 printf("device id %s%d redefined, please correct mtdids variable\n",
1677 MTD_DEV_TYPE(type), num);
1681 /* allocate mtdids structure */
1682 if (!(id = (struct mtdids *)malloc(sizeof(struct mtdids) + mtd_id_len))) {
1683 printf("out of memory\n");
1686 memset(id, 0, sizeof(struct mtdids) + mtd_id_len);
1690 id->mtd_id = (char *)(id + 1);
1691 strncpy(id->mtd_id, mtd_id, mtd_id_len - 1);
1692 id->mtd_id[mtd_id_len - 1] = '\0';
1693 INIT_LIST_HEAD(&id->link);
1695 debug("+ id %s%d\t%16lld bytes\t%s\n",
1696 MTD_DEV_TYPE(id->type), id->num,
1697 id->size, id->mtd_id);
1699 list_add_tail(&id->link, &mtdids);
1703 /* clean mtdids list and free allocated memory */
1704 list_for_each_safe(entry, n, &mtdids) {
1705 id_tmp = list_entry(entry, struct mtdids, link);
1717 * Parse and initialize global mtdids mapping and create global
1718 * device/partition list.
1720 * @return 0 on success, 1 otherwise
1722 int mtdparts_init(void)
1724 static int initialized = 0;
1725 const char *ids, *parts;
1726 const char *current_partition;
1728 char tmp_ep[PARTITION_MAXLEN + 1];
1729 char tmp_parts[MTDPARTS_MAXLEN];
1731 debug("\n---mtdparts_init---\n");
1733 INIT_LIST_HEAD(&mtdids);
1734 INIT_LIST_HEAD(&devices);
1735 memset(last_ids, 0, sizeof(last_ids));
1736 memset(last_parts, 0, sizeof(last_parts));
1737 memset(last_partition, 0, sizeof(last_partition));
1738 #if defined(CONFIG_SYS_MTDPARTS_RUNTIME)
1739 board_mtdparts_default(&mtdids_default, &mtdparts_default);
1746 ids = env_get("mtdids");
1747 parts = env_get_mtdparts(tmp_parts);
1748 current_partition = env_get("partition");
1750 /* save it for later parsing, cannot rely on current partition pointer
1751 * as 'partition' variable may be updated during init */
1752 memset(tmp_parts, 0, sizeof(tmp_parts));
1753 memset(tmp_ep, 0, sizeof(tmp_ep));
1754 if (current_partition)
1755 strncpy(tmp_ep, current_partition, PARTITION_MAXLEN);
1757 debug("last_ids : %s\n", last_ids);
1758 debug("env_ids : %s\n", ids);
1759 debug("last_parts: %s\n", last_parts);
1760 debug("env_parts : %s\n\n", parts);
1762 debug("last_partition : %s\n", last_partition);
1763 debug("env_partition : %s\n", current_partition);
1765 /* if mtdids variable is empty try to use defaults */
1767 if (mtdids_default) {
1768 debug("mtdids variable not defined, using default\n");
1769 ids = mtdids_default;
1770 env_set("mtdids", (char *)ids);
1772 printf("mtdids not defined, no default present\n");
1776 if (strlen(ids) > MTDIDS_MAXLEN - 1) {
1777 printf("mtdids too long (> %d)\n", MTDIDS_MAXLEN);
1781 /* use defaults when mtdparts variable is not defined
1782 * once mtdparts is saved environment, drop use_defaults flag */
1784 if (mtdparts_default && use_defaults) {
1785 parts = mtdparts_default;
1786 if (env_set("mtdparts", (char *)parts) == 0)
1789 printf("mtdparts variable not set, see 'help mtdparts'\n");
1792 if (parts && (strlen(parts) > MTDPARTS_MAXLEN - 1)) {
1793 printf("mtdparts too long (> %d)\n", MTDPARTS_MAXLEN);
1797 /* check if we have already parsed those mtdids */
1798 if ((last_ids[0] != '\0') && (strcmp(last_ids, ids) == 0)) {
1803 if (parse_mtdids(ids) != 0) {
1808 /* ok it's good, save new ids */
1809 strncpy(last_ids, ids, MTDIDS_MAXLEN);
1812 /* parse partitions if either mtdparts or mtdids were updated */
1813 if (parts && ((last_parts[0] == '\0') || ((strcmp(last_parts, parts) != 0)) || ids_changed)) {
1814 if (parse_mtdparts(parts) != 0)
1817 if (list_empty(&devices)) {
1818 printf("mtdparts_init: no valid partitions\n");
1822 /* ok it's good, save new parts */
1823 strncpy(last_parts, parts, MTDPARTS_MAXLEN);
1825 /* reset first partition from first dev from the list as current */
1826 current_mtd_dev = list_entry(devices.next, struct mtd_device, link);
1827 current_mtd_partnum = 0;
1830 debug("mtdparts_init: current_mtd_dev = %s%d, current_mtd_partnum = %d\n",
1831 MTD_DEV_TYPE(current_mtd_dev->id->type),
1832 current_mtd_dev->id->num, current_mtd_partnum);
1835 /* mtdparts variable was reset to NULL, delete all devices/partitions */
1836 if (!parts && (last_parts[0] != '\0'))
1837 return mtd_devices_init();
1839 /* do not process current partition if mtdparts variable is null */
1843 /* is current partition set in environment? if so, use it */
1844 if ((tmp_ep[0] != '\0') && (strcmp(tmp_ep, last_partition) != 0)) {
1845 struct part_info *p;
1846 struct mtd_device *cdev;
1849 debug("--- getting current partition: %s\n", tmp_ep);
1851 if (find_dev_and_part(tmp_ep, &cdev, &pnum, &p) == 0) {
1852 current_mtd_dev = cdev;
1853 current_mtd_partnum = pnum;
1856 } else if (env_get("partition") == NULL) {
1857 debug("no partition variable set, setting...\n");
1865 * Return pointer to the partition of a requested number from a requested
1868 * @param dev device that is to be searched for a partition
1869 * @param part_num requested partition number
1870 * @return pointer to the part_info, NULL otherwise
1872 static struct part_info* mtd_part_info(struct mtd_device *dev, unsigned int part_num)
1874 struct list_head *entry;
1875 struct part_info *part;
1881 debug("\n--- mtd_part_info: partition number %d for device %s%d (%s)\n",
1882 part_num, MTD_DEV_TYPE(dev->id->type),
1883 dev->id->num, dev->id->mtd_id);
1885 if (part_num >= dev->num_parts) {
1886 printf("invalid partition number %d for device %s%d (%s)\n",
1887 part_num, MTD_DEV_TYPE(dev->id->type),
1888 dev->id->num, dev->id->mtd_id);
1892 /* locate partition number, return it */
1894 list_for_each(entry, &dev->parts) {
1895 part = list_entry(entry, struct part_info, link);
1897 if (part_num == num++) {
1905 /***************************************************/
1906 /* U-Boot commands */
1907 /***************************************************/
1908 /* command line only */
1910 * Routine implementing u-boot chpart command. Sets new current partition based
1911 * on the user supplied partition id. For partition id format see find_dev_and_part().
1913 * @param cmdtp command internal data
1914 * @param flag command flag
1915 * @param argc number of arguments supplied to the command
1916 * @param argv arguments list
1917 * @return 0 on success, 1 otherwise
1919 static int do_chpart(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1921 /* command line only */
1922 struct mtd_device *dev;
1923 struct part_info *part;
1926 if (mtdparts_init() !=0)
1930 printf("no partition id specified\n");
1934 if (find_dev_and_part(argv[1], &dev, &pnum, &part) != 0)
1937 current_mtd_dev = dev;
1938 current_mtd_partnum = pnum;
1941 printf("partition changed to %s%d,%d\n",
1942 MTD_DEV_TYPE(dev->id->type), dev->id->num, pnum);
1948 * Routine implementing u-boot mtdparts command. Initialize/update default global
1949 * partition list and process user partition request (list, add, del).
1951 * @param cmdtp command internal data
1952 * @param flag command flag
1953 * @param argc number of arguments supplied to the command
1954 * @param argv arguments list
1955 * @return 0 on success, 1 otherwise
1957 static int do_mtdparts(cmd_tbl_t *cmdtp, int flag, int argc,
1958 char * const argv[])
1961 if (strcmp(argv[1], "default") == 0) {
1962 env_set("mtdids", NULL);
1963 env_set("mtdparts", NULL);
1964 env_set("partition", NULL);
1969 } else if (strcmp(argv[1], "delall") == 0) {
1970 /* this may be the first run, initialize lists if needed */
1973 env_set("mtdparts", NULL);
1975 /* mtd_devices_init() calls current_save() */
1976 return mtd_devices_init();
1980 /* make sure we are in sync with env variables */
1981 if (mtdparts_init() != 0)
1989 /* mtdparts add <mtd-dev> <size>[@<offset>] <name> [ro] */
1990 if (((argc == 5) || (argc == 6)) && (strncmp(argv[1], "add", 3) == 0)) {
1991 #define PART_ADD_DESC_MAXLEN 64
1992 char tmpbuf[PART_ADD_DESC_MAXLEN];
1993 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
1994 struct mtd_info *mtd;
1995 uint64_t next_offset;
1998 struct mtd_device *dev;
1999 struct mtd_device *dev_tmp;
2001 struct part_info *p;
2003 if (mtd_id_parse(argv[2], NULL, &type, &num) != 0)
2006 if ((id = id_find(type, num)) == NULL) {
2007 printf("no such device %s defined in mtdids variable\n", argv[2]);
2011 len = strlen(id->mtd_id) + 1; /* 'mtd_id:' */
2012 len += strlen(argv[3]); /* size@offset */
2013 len += strlen(argv[4]) + 2; /* '(' name ')' */
2014 if (argv[5] && (strlen(argv[5]) == 2))
2015 len += 2; /* 'ro' */
2017 if (len >= PART_ADD_DESC_MAXLEN) {
2018 printf("too long partition description\n");
2021 sprintf(tmpbuf, "%s:%s(%s)%s",
2022 id->mtd_id, argv[3], argv[4], argv[5] ? argv[5] : "");
2023 debug("add tmpbuf: %s\n", tmpbuf);
2025 if ((device_parse(tmpbuf, NULL, &dev) != 0) || (!dev))
2028 debug("+ %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type),
2029 dev->id->num, dev->id->mtd_id);
2031 p = list_entry(dev->parts.next, struct part_info, link);
2033 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2034 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
2037 if (!strcmp(&argv[1][3], ".spread")) {
2038 spread_partition(mtd, p, &next_offset);
2039 debug("increased %s to %llu bytes\n", p->name, p->size);
2043 dev_tmp = device_find(dev->id->type, dev->id->num);
2044 if (dev_tmp == NULL) {
2046 } else if (part_add(dev_tmp, p) != 0) {
2047 /* merge new partition with existing ones*/
2052 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
2053 printf("generated mtdparts too long, resetting to null\n");
2060 /* mtdparts del part-id */
2061 if ((argc == 3) && (strcmp(argv[1], "del") == 0)) {
2062 debug("del: part-id = %s\n", argv[2]);
2064 return delete_partition(argv[2]);
2067 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2068 if ((argc == 2) && (strcmp(argv[1], "spread") == 0))
2069 return spread_partitions();
2070 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
2072 return CMD_RET_USAGE;
2075 /***************************************************/
2077 chpart, 2, 0, do_chpart,
2078 "change active partition",
2080 " - change active partition (e.g. part-id = nand0,1)"
2083 #ifdef CONFIG_SYS_LONGHELP
2084 static char mtdparts_help_text[] =
2086 " - list partition table\n"
2088 " - delete all partitions\n"
2089 "mtdparts del part-id\n"
2090 " - delete partition (e.g. part-id = nand0,1)\n"
2091 "mtdparts add <mtd-dev> <size>[@<offset>] [<name>] [ro]\n"
2092 " - add partition\n"
2093 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2094 "mtdparts add.spread <mtd-dev> <size>[@<offset>] [<name>] [ro]\n"
2095 " - add partition, padding size by skipping bad blocks\n"
2097 "mtdparts default\n"
2098 " - reset partition table to defaults\n"
2099 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2101 " - adjust the sizes of the partitions so they are\n"
2102 " at least as big as the mtdparts variable specifies\n"
2103 " and they each start on a good block\n\n"
2106 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
2108 "this command uses three environment variables:\n\n"
2109 "'partition' - keeps current partition identifier\n\n"
2110 "partition := <part-id>\n"
2111 "<part-id> := <dev-id>,part_num\n\n"
2112 "'mtdids' - linux kernel mtd device id <-> u-boot device id mapping\n\n"
2113 "mtdids=<idmap>[,<idmap>,...]\n\n"
2114 "<idmap> := <dev-id>=<mtd-id>\n"
2115 "<dev-id> := 'nand'|'nor'|'onenand'<dev-num>\n"
2116 "<dev-num> := mtd device number, 0...\n"
2117 "<mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)\n\n"
2118 "'mtdparts' - partition list\n\n"
2119 "mtdparts=mtdparts=<mtd-def>[;<mtd-def>...]\n\n"
2120 "<mtd-def> := <mtd-id>:<part-def>[,<part-def>...]\n"
2121 "<mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)\n"
2122 "<part-def> := <size>[@<offset>][<name>][<ro-flag>]\n"
2123 "<size> := standard linux memsize OR '-' to denote all remaining space\n"
2124 "<offset> := partition start offset within the device\n"
2125 "<name> := '(' NAME ')'\n"
2126 "<ro-flag> := when set to 'ro' makes partition read-only (not used, passed to kernel)";
2130 mtdparts, 6, 0, do_mtdparts,
2131 "define flash/nand partitions", mtdparts_help_text
2133 /***************************************************/